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Old 03-04-2018, 07:11 PM   #13
Ghetto Fireman
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Join Date: Oct 2014
Location: Venice, California
Posts: 59
Re: 57 3100 4-speed Disc Brakes

Quote:
Originally Posted by sack54 View Post
The under cab master cylinder will bolt on fine and you can use your stock pedal, I just installed the unit into my 56 GMC bolted right in even with my 4 speed transmission. There is plenty of room. If you had three on the tree you would need new cross member, that is what the company told me ,had same concerns as you do.
Got the one I used is from Brothers truck Parts
Thanks for the reply, I went to the Brothers website and looked at the frame mounted booster, bottom line under NOTES says this will not work with manual transmissions. Nice to hear from someone who has experienced it first hand. Looks like I’ll be ordering one.

Thanks

Mike
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